Boiler-furnace.



l. SWANSON.

BOILER FURNCE.

APPLICATION FILED MN.H,1916.

1,209,070. Patented Dea-19,1%. 2 SHEETS-SHEET l.

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l. SWANSON.

BOILER FURNACE.

APPLICATION FILED 1m17.191s.

lig-- Patented Dec. 1 9, 1916.

`2 SHEETS-SHEET 2.

.ToHN swANsoN, or MOBILE', ALABAMA.

BoILER-FURNACE. o j

Specification of Letters Patent.

Patented Bec. 1%, 1916.

f Application filed January 17, 1916. Seria1No.-.72,566.

To all 'whom t may concern Be it known that I, JonN SwANsoN, a citizenof they United States, residing at hffobile, in the county of Mobile andState of Alabama, have invented new and useful lm .provements inBoiler-Furnaces,.r of which the following is a specification.

rlhe present invention relates to improvements in boiler furnaces. i

In carrying out my invention it is my purpose to construct a furnace forboilers wherein the heat units will be distributed to the top and sidesof a furnace wallso thatY the water at the bottom of the boiler will beheated simultaneously with the water at the top and sides Vof thefurnace and whereby a proper circulation of the water under the bottomof the furnace will be created.

It is also my purpose to construct atubular furnace for boilersincluding angulaiside grates and a connecting dome grate each adapted toreceive a bed of fire, the arrangement being such as to materially in-Vcrease the heating capacity as compared with the ordinary constructionof such devices.

A further object of the invention is to construct a tubular furnace andto arrange the same longitudinally of a boiler, to provide the furnacewith a plurality of angularly arranged side grate members and an arched.grate member connecting the upper side grates, each of the gratesreceiving a fire bed and the upper arched shaped grate comprisingmovable members which may be arranged to bring the lire in close contactwith the top of the furnace to create a greater or determined amount ofheat at this portion of the furnace. Y

With the above and other objects in view, the improvement resides in theconstruction, combination and arrangement of parts set forth in thefollowing specification and fall-v ing within the scope of the appendedclaims.

In the drawings, Figure l is a view of a boiler provided with myimproved furnace, Fig. 2 is an enlarged horizontal sectional viewapproximately on the line 2-2 of Fig.y l, Fig. 3 is a verticallongitudinal sectional view on an enlarged scale, and takenapproximately on the line 3 3 of Fig. l. Fig. 4 is a transversesectional view approximately on the line 4.--4 of Fig. 3, Fig. 5 is aperspective view of a portion of the tubular furnace and the gratetherein, and Fig. 6 is a view illustrating the upper grate membersraised to bring the lire close to the top of the furnace. p

Referring now to the drawings in detail,

vthe numeral 1 designates a tubular steam boiler, and arranged adjacentthebottom of the boiler and extending longitudinally therewith isa pairof spaced tubes 2 2. Each of these -tubes 2 provides a casing for thefurnace, and the outer vends of each of the tubes is closed by a plate 3having an enlarged opening adjacent Vthe upper end thereof closed by adoor l and a. smaller side opening closed by doors as well as a centralopening closed Vby a door G.

Arranged in each of the casings 2 .is a

grate of peculiar formation constructed in accordance with my invention.The grate is constructed to provide `a plurality o f fire boxes, andinreality a plurality of grates. The grate sections ycomprise sidemembers and an upper arched connecting member. The sides, in the showingof the drawings, include two grates each comprising a horizontal shelfand an obtuseangular extension terminating in a flat plate or sidemembervwhich projects above and is connected with Y the superimposed shelf ofthe upper grate, and the side members of the `said upper shelf arelikewise connected to or form a support for the longitudinal edges ofthe said upper grate.

The lower shelf members, indicated .by

the vnumerals 7, rest upon transverse cleats 8 disposed upon the innerend of the furnace casing, and which may `be likewise' disposed at otherpoints best suited forV supporting the said shelves 7. The gratemembers' are of the herring-bone class and the inner ends of each of theshelves 7 is formed with an inwardly extending upwardly inclined grateextension 9 that terminates inaco-extensive flat non-pervious side 10.The side 10, at its opposite ends, is provided with angularly arrangedears 11 that are bolted to the end plates of the furnace, and the sides10project a suitable distance above the horizontal shelves 12 of theupper side grate members. The ends of these grate members are supportedupony the transverse cleats 13 arranged-'at the ends of the tubularfurnace and one of the longitudinal edges of each of the shelves 12contacts with the side plates l0 of the respectivey grates 7 The gratesof the shelves 12 are also of the her-V ring-bone construction, as karetheir inwardly eXtending angularly arranged portions 14. The angularportions 14 terminate in coextensive non-pervious fiat plates 15 whichhave their ends provided with ears 16 which are bolted to the end platesof a furnace, and the sides 15 extend a suitable distance above thelongitudinal ends of the dome-shaped upper grate 17. The grate 17 hasits longitudinal edges contacting with the side plates 15 and its endsare supported upon curved cleats 18 which are secured to the oppositeends of the furnace. The upper dome-shaped grate 17 is also of theherring-bone construction and preferably comprises two grates 19 and 20respectively, and these grates may be raised toward the top of thefurnace to bring the bed of fire closer to the said top so that agreater amount of heat may be thus applied to the top. rlhe ash pit,indicated by the numeral 21, is disposed below the grates. To operatethe grates 19 and 20, a rod a may be journaled in suitable bearings andhave eccentrically arranged thereon Wheel or roller members b. The endof the rod a may extend through a suitable opening in the outer face ofthe boiler and is shaped to receive the angular socket of an ordinaryshaker handle. When the rod is revolved in one direction the cam oreccentric members b will contact with the grates 19 and 20, and when therod is revolved in the other direction, the grates Will drop by `gravityupon their supporting cleats 18.

The ashes and clinkers from the grate members 19 and 20 which do notfall directly into the ash pit 21 Will contact With the inclined sides15 of the upper grate members 12 and be directed thereby to the centero-f the ash pit. The ashes Which fall from the grate 12 Will contactWith the angular sides 10 of the grate 7v and Will likewise be centrallydelivered to the ash pit 21. The doors 5 provide admission to the fireboxes for the grates 7 and 12, the door A l for the central grate 17,While the door 6 closes the entrance to the ash pit. f

From the above description, taken in connection With the accompanyingdrawings, the simplicityl of the device, as Well as the advantagesthereof will, it is thought, be perfectly apparent to those skilled inthe art to which such invention appertains Without further detaileddescription.

Having thus described the invention, What I claim is:

1. AIn a furnace fo-r boilers, a tubular casing, spaced side grates inthe casino', said side grates including each a horizontally straightgrate portion, an angular grate portion connected With the inner endthereof and overlying the said shelf, a non-pervious side plateco-eXtensive With the angular grate portions and extending above thehorizontal shelf portion of the adjacent grate, and an upper gratemember connected with the upper side plates.

2. A grate for boilers including a tubular casing, side grates in thecasing, each of said side grates including horizontal grate bars andangular grate bars formed in the inner ends of said horizontal gratebars and eX- tending angularly over the saine, non-pervious side platesco-extensive with the angular grate bars and projecting above thehorizontal members of the adjacent grate sections, and a dome-shapedgrate connecting the side plates of the upper grates below the upperedges of the same.

3. A grate for boilers including a tubular casing, side grates in thecasing, each of said side grates including horizontal grate bars andangular grate bars formed at the inner ends of said horizontal gratebars and extending angularly over the saine, nonpervious side platesco-eXtensive with the angular grate bars and projecting above thehorizontal members of the adjacent grate sections, and a dome-shapedgrate connected with the side plates of the upper grates below the upperedges of the same, said dom shaped gratecomprising a plurality ofindependent members.

In testimonyV vvhereof 1 affix my signature in presence oftWo Witnesses.

JOHN SWANSON.

Witnesses:

WILLIAM J. NonviLLn, HENRY NEVILLE.

Gopies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. C.

